Most Helpful Guy

Most second dates are set up at the end of a successful first date. At least one person will say/ask about it. "Hey I had a good time, we should do this again." Anything that was similar to that should have been the indicator.

Myself, I wouldn't wait any longer than a week to have the second date. If I was going to be out of town to visit family or for work longer than a week, then maybe more than a week between; but a call during that time for sure.